rb_waitpid        554 ext/pty/pty.c      if (rb_waitpid(info->child_pid, &st, WNOHANG) <= 0)
rb_waitpid        689 ext/pty/pty.c      cpid = rb_waitpid(NUM2PIDT(pid), &status, flag);
rb_waitpid        642 include/ruby/intern.h rb_pid_t rb_waitpid(rb_pid_t pid, int *status, int flags);
rb_waitpid       4376 io.c           	rb_waitpid(fptr->pid, &status, nohang ? WNOHANG : 0);
rb_waitpid        995 process.c          if ((pid = rb_waitpid(pid, &status, flags)) < 0)
rb_waitpid       1061 process.c      	pid = rb_waitpid(-1, &status, 0);
rb_waitpid       1087 process.c          while ((cpid = rb_waitpid(pid, &status, 0)) == 0) {
rb_waitpid       3902 process.c          rb_waitpid(pid, &status, 0);
rb_waitpid       4077 process.c              ret = rb_waitpid(pid, &status, 0);